<!DOCTYPE html>
<html>
<head>
    <title>栅格系统</title>
    <meta charset="UTF-8">
    <meta http-equiv="x-ua-compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="lib/bootstrap/css/bootstrap.min.css" rel="stylesheet">
</head>
<style>
    div{
        border: 1.5px solid #000000;
    }
</style>
<br>
<div class="container">
    <div class="row">
        <div class="col-md-3 col-xs-6">1</div>
        <div class="col-md-3 col-xs-6">2</div>
        <div class="col-md-3 col-xs-6">3</div>
        <div class="col-md-3 col-xs-6">4</div>
    </div>
    <div class="row">
        <div class="col-md-3 col-xs-6">5</div>
        <div class="col-md-3 col-xs-6">6</div>
        <div class="col-md-3 col-xs-6">7</div>
        <div class="col-md-3 col-xs-6">8</div>
    </div>
</div>
<script src="lib/jquery/jquery-1.11.0.min.js"></script>
<script src="lib/bootstrap/js/bootstrap.min.js"></script>
</body>
</html>
